Micelle catalyzed oxidative degradation of norfloxacin by chloramine-T

Shrivastava, Alpa; Singh, Ajaya Kumar; Sachdev, Neerja; Shrivastava, Dilip Raj; Katre, Yokraj; Singh, Surya Prakash; Singh, Man; Mejuto, J. C.

doi:10.1016/j.molcata.2012.04.004

Cited by 20 publications

(4 citation statements)

References 72 publications

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“…These microdispersed systems often affect the rate of the reactions especially when the reactions take place at the interface of these media [6][7][8][9]. Micelles and reverse micelles are nowadays used to prepare nanoparticles of coinage metals such as copper, silver and gold which have strong catalytic effect on different reactions [10,11].…”

Section: Introductionmentioning

confidence: 99%

Specific interactions of anions and pre-micelles in the alkaline fading of crystal violet carbocation

Sen

Talukder

Pal³

2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Section: Introductionmentioning

confidence: 99%

Specific interactions of anions and pre-micelles in the alkaline fading of crystal violet carbocation

Sen

Talukder

Pal³

2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…It may be mentioned that the CMC of a surfactant is often found to decrease in the presence of electrolytes or charged species or organic additives in the medium 30,31 . Such a decrease in CMC values of surfactant has been found in earlier studies 3,32,33 . During the formation of premicelle, a small number of MV + and surfactant anion aggregate through electrostatic interaction with a small decrease in free energy.…”

Section: Resultsmentioning

confidence: 76%

Evidence of formation of dye–surfactant ion pair micelle in the anionic surfactant mediated alkaline fading of methyl violet carbocation

Ghosh

Sen

Pal³

2021

Int J of Chemical Kinetics

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In the submicellar solution of anionic surfactants sodium dodecyl sulfate (SDS) and dioctyl sodium sulfosuccinate (AOT), the alkaline fading of methyl violet (MV+) carbocation has been studied spectrophotometrically in the temperature range 293–308 K. The interaction behavior of the dye carbocation with the anionic surfactant and the observed submicellar rate retardation is consistent with the ion pair and subsequent ion‐pair micelle formation. The change in the spectral pattern along with a change in the peak intensity and shoulder intensity with increasing surfactant concentrations indicates the shifting of the equilibrium between the helical and distorted helical isomers of MV+ owing to the existence of dye–surfactant ion pair, ion‐pair micelles, and dye‐embedded micelles. This dynamic dye–surfactant ion‐ion interaction has been corroborated by the tensiometric studies. The decrease in the fading rate and the change in the spectral pattern in the presence of anion, especially I–, support the existence of the dye–anion interaction. The premicellar rate inhibition and the corresponding interaction have been accounted for by the use of two kinetic models namely, Olson–Simonson and Piszkiewicz cooperativity models. The cooperativity index value suggested a 1:1 dye–surfactant association in both the surfactants. The ratio of the concentration of the premicellar complex and the free dye cation indicates appreciable binding. The kinetic and thermodynamic parameters associated with the dye–surfactant complex have been explained in terms of dye–surfactant, dye–water, and surfactant–water interactions.

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“…In the oxidative transformation of norfloxacin using alkaline KMnO 4 , Naik et al have reported the insertion of OH radical at C2 of the quinolone ring to form 1-ethyl-6-fluoro-2-dihydroxy-4-oxo-7-piperazin-1-yl-1,4-hydro-quinoline-3-carboxylic acid as the main reaction products [17]. Srivastava et al, in the oxidative degradation of norfloxacin by the oxidant chloramine-T in aqueous micellar medium, reported the cleavage of C2-C3 bond to form 3-fluoro-4-piperazinoyl-6-Nethylaminophenylglyoxalic acid as the main reaction product [16]. Similar oxidation product of norfloxacin has also been isolated by Nanda Scheme 1.…”

Section: Resultsmentioning

confidence: 99%

“…In view of potential pharmaceutical importance of norfloxacin and presence of few literatures on the mechanism of oxidation of this drug [15][16][17], there is a need to understand the mode of interaction with the oxidizing agents and mechanism of oxidative metabolism of this drug in biomimetic medium.…”

Section: Introductionmentioning

confidence: 99%

Oxidative degradation of norfloxacin by a lipophilic oxidant, cetyltrimethylammonium permanganate in water–acetonitrile medium: A kinetic and mechanistic study

Garnayak

Patel

2015

Journal of Molecular Liquids

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Micelle catalyzed oxidative degradation of norfloxacin by chloramine-T

Cited by 20 publications

References 72 publications

Specific interactions of anions and pre-micelles in the alkaline fading of crystal violet carbocation

Specific interactions of anions and pre-micelles in the alkaline fading of crystal violet carbocation

Evidence of formation of dye–surfactant ion pair micelle in the anionic surfactant mediated alkaline fading of methyl violet carbocation

Oxidative degradation of norfloxacin by a lipophilic oxidant, cetyltrimethylammonium permanganate in water–acetonitrile medium: A kinetic and mechanistic study

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